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Answers.everydaycalculation.com » Compare fractions

Compare 21/45 and 20/70

21/45 is greater than 20/70

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 70 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 45 × 14 = 630,
    21/45 = 21 × 14/45 × 14 = 294/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    20/70 = 20 × 9/70 × 9 = 180/630
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 294/630 > 180/630 or 21/45 > 20/70

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